QR is the recirculating valve based on the TiAL high performance Q. Outline interchangeable with the Q and original BV50. It's Offered with a variety of springs for difference vacuum levels, and a special spring for supercharged vehicles. Customizable outlet ports offer flexibility to integrate into custom & existing applications.

GFB's whistling trumpet gives off a unique high-pitch whistle sound on gearshift. It is a direct screw-on replacement for the standard trumpet found on most GFB valves, and is recommended for use where peak boost pressure is above 13psi.